book Maths Puzzle Numerical Ability

How many ways can a president, vice president, secretary, and treasurer be chosen from a club with nine members?

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book Other Question

1. Factor completely:
x3 - 26x2 + 48x

2. Factor completely:
x2 - 6wy + 3xy - 2wx

3. Factor completely:
x2 - 5x - 14

4. Factor completely:
4x2 - 36y2

5. Factor c
How do I work this equation, y= 1/x-2 if x= -2, -1, 0, 1, 2, 3?